在這項研究中，我們基於2013年至2015學年入學的退學學生的不及格課

在這項研究中，我們基於2013年至2015學年入學的退學學生的不及格課程，並試圖發現失敗課程的因果關係，並且找出學生在低年級的不及格的課程。

結果 (英文) 1:

In this study, we based on 2013-2015 school year enrollment of students dropping out of courses failed, and failed attempts to find a causal relationship between the course and find the students failed the course in lower grades.

結果 (英文) 2:

In this study, we based our slotted tests on dropout students enrolled in the 2013-2015 school year, and tried to find a causal relationship between failing courses and the failings of students in lower grades.

結果 (英文) 3:

In this study, we are based on the failed courses of the dropout students enrolled in 2013-2015 academic year, and try to find the causal relationship between the failed courses, and find out the failed courses of the students in the lower grades.